软件功能描述
（1）TCP server 实现根据 “IP地址” 和 “端口号” 开启服务器，监听连接，收发数据功能。
（2）TCP client 实现根据 “IP地址” 和 “端口号” 连接服务器，收发数据功能。
目前只实现了一对一通信，只能有一个client，可通过动态创建socket的方式实现多个client。
实现步骤
创建工程
开发环境：Qt Creator 5.12.8 qt-opensource-windows-x86-5.12.8
下图中没展示的步骤使用默认设置即可。
添加client
现在就有了两个ui
ui设计
Server 界面：
Client界面：
控制程序
TCP.pro
QT += core gui network
greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
CONFIG += c++11
# The following define makes your compiler emit warnings if you use
# any Qt feature that has been marked deprecated (the exact warnings
# depend on your compiler). Please consult the documentation of the
# deprecated API in order to know how to port your code away from it.
DEFINES += QT_DEPRECATED_WARNINGS
# You can also make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
# You can also select to disable deprecated APIs only up to a certain version of Qt.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000 # disables all the APIs deprecated before Qt 6.0.0
SOURCES += \
client.cpp \
main.cpp \
server.cpp
HEADERS += \
client.h \
server.h
FORMS += \
client.ui \
server.ui
CONFIG += c++11
# Default rules for deployment.
qnx: target.path = /tmp/$${
TARGET}/bin
else: unix:!android: target.path = /opt/$${
TARGET}/bin
!isEmpty(target.path): INSTALLS += target
client.h
#ifndef CLIENT_H
#define CLIENT_H
#include <QWidget>
#include <QTcpServer>
#include <QTcpSocket>
namespace Ui {
class Client;
}
class Client : public QWidget
{
Q_OBJECT
public:
explicit Client(QWidget *parent = nullptr);
~Client();
private:
Ui::Client *ui;
//QTcpServer* server;//监听的套接字
QTcpSocket* client;//通信的套接字
};
#endif // CLIENT_H
server.h
#ifndef SERVER_H
#define SERVER_H
#include <QWidget>
#include <QTcpServer>
#include <QTcpSocket>
QT_BEGIN_NAMESPACE
namespace Ui {
class Server; }
QT_END_NAMESPACE
class Server : public QWidget
{
Q_OBJECT
public:
Server(QWidget *parent = nullptr);
~Server();
private:
Ui::Server *ui;
QTcpServer* server;//监听的套接字
QTcpSocket* conn;//通信的套接字
};
#endif // SERVER_H
client.cpp
#include "client.h"
#include "ui_client.h"
Client::Client(QWidget *parent) :
QWidget(parent),
ui(new Ui::Client)
{
ui->setupUi(this);
//ui init
ui->IP->setText("192.168.50.116");
ui->PORT->setText("12321");
ui->state->setText("状态：未连接");
connect(ui->Connect, &QPushButton::clicked, this, [=]()
{
// init
client = new QTcpSocket(this);
//连接服务器
client->connectToHost(QHostAddress(ui->IP->text()),ui->PORT->text().toInt());
ui->state->setText("状态：已连接");
ui->record->append("已连接到服务器---IP：" + ui->IP->text() + " 端口：" + ui->PORT->text());
//接收数据
connect(client, &QTcpSocket::readyRead, this, [=]()
{
QByteArray array = client->readAll();
ui->record->append("Server: " + array);
});
//发送
connect(ui->send, &QPushButton::clicked, this, [=]()
{
//发送数据
client->write(ui->msg->toPlainText().toUtf8());
ui->record->append("Client: " + ui->msg->toPlainText());
//clear
//ui->textEdit_2->clear();
});
});
}
Client::~Client()
{
delete ui;
}
server.cpp
#include "server.h"
#include "ui_server.h"
Server::Server(QWidget *parent)
: QWidget(parent)
, ui(new Ui::Server)
{
ui->setupUi(this);
//ui init
ui->IP->setText("192.168.50.116");
ui->PORT->setText("12321");
ui->state->setText("状态：未开启");
connect(ui->OpenServer, &QPushButton::clicked, this, [=]()
{
//实例化
server = new QTcpServer(this);
//监听
server->listen(QHostAddress(ui->IP->text()),ui->PORT->text().toInt());
ui->state->setText("状态：已开启");
//新的连接
connect(server, &QTcpServer::newConnection, this, [=]()
{
//接收客户端的套接字对象accept
// sock_addr 结构体 == 类 QTcpSocket
conn = server->nextPendingConnection();
QString str;
ui->record->append("客户端接入---IP: " + conn->peerAddress().toString() +" 端口："+ str.sprintf("%d", (conn->peerPort())));
//接收数据
connect(conn, &QTcpSocket::readyRead, this, [=]()
{
QByteArray array = conn->readAll();
ui->record->append("Client: " + array);
});
});
//发送
connect(ui->send, &QPushButton::clicked, this, [=]()
{
//发送数据
conn->write(ui->msg->toPlainText().toUtf8());
//char data[1024];data[0]=0xeb;data[1]=0x90;
//conn->write(data,1024);
ui->record->append("Server: " + ui->msg->toPlainText());
//clear
//ui->textEdit_2->clear();
});
});
}
Server::~Server()
{
delete ui;
}
main.cpp
#include "server.h"
#include "client.h"
#include <QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
Server w;
w.setWindowTitle("TCP Server");
w.show();
Client c;
c.setWindowTitle("TCP Client");
c.show();
return a.exec();
}
界面展示
